make_afr

compas_cra.equilibrium.make_afr(total_vcount, fcon_number=8, mu=0.8, penalty=False, friction_net=False)[source]

Create friction matrix Afr and Afr@B.

Parameters

  • total_vcount (int) – The total number of vertices

  • fcon_number (int, optional) – N-sided of linearised friction cone.

  • mu (float, optional) – Friction coefficient.

  • penalty (bool, optional) – Return penalty matrix if True.

  • friction_net (bool, optional) – Friction net formulation if True for the penalty formulation, friction plus formulation if True.

Returns

csr_matrix – the basis matrix # Nx3